PIKALOVA, V. V. Improving professional training of pre-service math teachers on the basis of massive open online courses. CTE Workshop Proceedings, Kryvyi Rih, Ukraine, v. 3, p. 180–189, 2015. DOI: 10.55056/cte.262. Disponível em: https://acnsci.org/journal/index.php/cte/article/view/262.. Acesso em: 26 may. 2026.